CN111395327A - Rotary single pile foundation and construction method thereof - Google Patents
Rotary single pile foundation and construction method thereof Download PDFInfo
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- CN111395327A CN111395327A CN202010220668.2A CN202010220668A CN111395327A CN 111395327 A CN111395327 A CN 111395327A CN 202010220668 A CN202010220668 A CN 202010220668A CN 111395327 A CN111395327 A CN 111395327A
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- 239000002689 soil Substances 0.000 claims abstract description 111
- 238000000034 method Methods 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 30
- 230000003993 interaction Effects 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 4
- 206010057175 Mass conditions Diseases 0.000 claims description 2
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 16
- 238000010008 shearing Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 50
- 239000011435 rock Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/56—Screw piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/22—Placing by screwing down
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/26—Placing by using several means simultaneously
Abstract
The invention belongs to the technical field of single-pile foundations, and discloses a screwing single-pile foundation and a construction method thereof, wherein inclined or spiral screwing bearing blades are arranged on the outer side of a pile body according to the soil conditions of different foundation in-place sites, and the screwing bearing blades are used for screwing in a foundation; during construction, pile driving is carried out by utilizing pile driving equipment, and a pile body automatically rotates downwards to enter soil under the interaction of the rotary bearing blades and the soil body in the pile driving process. The section area of the rotary bearing blade is larger, and larger bearing capacity is provided for the foundation, so that the diameter and the length of the pile body can be reduced, and the economic benefit is improved; in the process of driving the foundation, the pile body automatically rotates under the action of the rotating bearing blades, and the rotating bearing blades have a certain shearing effect on the soil body, so that the foundation gradually turns into the soil body with weakened strength under the action of self torsion, and the construction is convenient and rapid.
Description
Technical Field
The invention belongs to the technical field of single-pile foundations, and particularly relates to a novel single-pile foundation and a construction method thereof.
Background
The single pile foundation pile body is simple in connection form, small in hot spot stress and good in fatigue resistance. The fan load, the wave load and the water flow load borne by the single-pile foundation are transmitted to a deep soil body through the pile body, the horizontal bearing capacity of the single-pile foundation mainly depends on the horizontal resistance of the rock and soil mass around the pile and the horizontal bearing capacity provided by the pile, and the problem to be solved urgently is to improve the bearing capacity of the single-pile foundation.
Traditional single pile foundation pile is long longer, and the pile process of driving needs the pile extension, and meets engineering geological conditions and more special, and the overburden buried depth is more shallow, and when being the basement rock under the overburden, because traditional steel-pipe pile can't inlay the rock, be difficult to satisfy resistance to plucking, horizontal bearing capacity requirement, if adopt to inlay the rock pile, need carry out the soil body excavation, foundation construction is complicated, efficiency reduction.
Disclosure of Invention
The invention aims to solve the technical problems that the single-pile foundation is difficult to pile when the foundation is hard and the bearing capacity of the single-pile foundation is insufficient when the foundation is soft, and provides a screwing single-pile foundation and a construction method thereof, which can provide larger bearing capacity, reduce the diameter and the length of a pile body, facilitate and fast construction, improve economic benefit and enable the single-pile foundation to be better applied to actual engineering.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the utility model provides a beat and revolve single pile basis, includes the pile body, the pile body outside is provided with slope form or spiral helicine beat and revolves and bear the blade, it is used for the screw in ground to beat and revolves and bear the blade.
Further, a soft soil layer exists in the foundation in-place site, and the rotary bearing blades are arranged at the height of the pile body corresponding to the position of the soft soil layer in the foundation in the in-place state.
Further, a hard soil layer exists in a foundation in-place site, and the rotary bearing blades are arranged at the bottom of the pile body.
Further, the rotary bearing blades are arranged on the outer side of the pile body in a through-length mode.
Further, according to the soil mass condition of the soil body corresponding to the rotation bearing blade in the foundation in-place state, the width of the rotation bearing blade is adjusted according to the soil body strength and the pile body stress;
the diameters of the pile bodies are consistent along the height direction, and the extension widths of the rotation bearing blades are consistent along the height direction;
or the diameter of the pile body is reduced along the height direction, the extension width of the rotary bearing blade is changed along the height direction, and the overall extension width of the rotary single pile foundation is consistent along the height direction;
or the diameter of the pile body is variable in diameter along the height direction, the extension width of the rotary bearing blade is changed along the height direction, and the overall extension width of the rotary single pile foundation is changed along the height direction.
Further, a blade pipeline is arranged on the outer side of the pile body along the root of the rotary bearing blade, and a plurality of blade spray heads are arranged on the blade pipeline.
Furthermore, the pile body is connected with the inner side of the pipe wall of the section of the rotary bearing blade, pile side pipelines are uniformly distributed in the circumferential direction of the inner wall of the thickened section, and a plurality of pile side nozzles are distributed in the pile side pipelines.
The construction method of the spinning single-pile foundation comprises the steps that the spinning single-pile foundation is driven by the pile driving equipment, and the pile body automatically rotates downwards to enter the soil under the interaction of the spinning bearing blades and the soil body in the pile driving process.
Further, a blade pipeline is arranged on the outer side of the pile body along the root of the rotation bearing blade, and a plurality of blade nozzles are arranged in the blade pipeline; and water is sprayed to the soil body through the blade spray heads in the piling process.
Furthermore, the inner side of the pipe wall of the section of the pile body connected with the spinning bearing blade is thickened, pile side pipelines are circumferentially and uniformly distributed on the inner wall of the thickened section, and a plurality of pile side nozzles are distributed on the pile side pipelines; and spraying water to the soil body through the pile side spray head in the piling process, and spraying the slurry to the soil body through the pile side spray head after the single pile foundation is in place.
The invention has the beneficial effects that:
according to the foundation in-place site soil property condition, the swirling bearing blades are arranged at different high positions outside the pile body, the cross section area of the swirling bearing blades is larger, and larger bearing capacity is provided for the foundation, so that the diameter and the length of the pile body can be reduced, and the economic benefit is improved;
the invention can arrange pipelines and nozzles in the roots of the rotation bearing blades and the side walls of the pile bodies connected with the rotation bearing blades, on one hand, water can be sprayed to the surrounding soil body in the piling process, and the resistance of the pile soil side mold is reduced; on the other hand, the mortar is sprayed in the in-place state, so that the basic bearing capacity is improved;
in the process of driving the foundation, the pile body automatically rotates under the action of the rotation bearing blade along with the hammering of the piling equipment, and the rotation of the rotation bearing blade has a certain shearing action on the soil body, so that the foundation is gradually transferred into the soil body with weakened strength under the action of the self torsion, and the construction is convenient and rapid.
Drawings
FIG. 1 is a schematic structural view of a rotary mono-pile foundation employing inclined rotary carrying blades;
FIG. 2 is a schematic structural view of a rotary mono-pile foundation employing helical rotary load bearing blades;
FIG. 3 is a schematic layout of the blade duct and the pile-side duct of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a schematic view of the construction process of the rotary single-pile foundation provided in example 1;
FIG. 6 is a schematic structural view of a screw-driving mono-pile foundation provided in example 3;
FIG. 7 is a schematic view of the construction process of the rotary single-pile foundation provided in example 3;
FIG. 8 is a schematic structural view of a screw-driving mono-pile foundation provided in example 4;
fig. 9 is a schematic view of a construction process of the rotary single-pile foundation provided in embodiment 4.
In the above figures: 1. a pile body; 2. rotating the bearing blade; 3. a blade duct; 4. a pile-side duct; 5. a pile hammer; 6. a normal soil layer; 7. a rock layer; 8. covering a soft soil layer; 9. a harder soil layer; 10. a lower soft soil layer; 11. and (4) a sludge interlayer.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 4, the present invention discloses a screwing single pile foundation, which mainly comprises a pile body 1 and screwing bearing blades 2, wherein the screwing bearing blades 2 can adopt an inclined shape or a spiral shape and are used for screwing into a foundation. The pile body 1 is made of concrete or steel materials, and the mud penetration depth is 10-100 m. According to the soil conditions of different foundation in-place sites, the rotary bearing blades 2 are arranged at different heights outside the pile body 1, or the full length is arranged outside the pile body 1.
If a soft soil layer exists in a foundation in-place site, in general, the pile body 1 is provided with the screwing bearing blades 2 corresponding to the height of the soft soil layer in the in-place state of the foundation, and the screwing bearing blades 2 are screwed into the foundation to provide main bearing capacity, so that the length of the pile body 1 can be reduced, and the construction is convenient. The soft soil layer referred to in the present invention includes, but is not limited to, cohesive soil layer in soft plastic/fluid plastic state, sand soil layer in loose state, untreated filling soil and other high compressibility soil layer.
If there is the great hardpan of intensity that is difficult to pile in the place of basic site of taking one's place, under general condition, pile 1 bottom is arranged and is beaten the bearing blade 2 soon, and the back pile 1 bottom that takes one's place of basic is fallen in hardpan top, beats and revolves bearing blade 2 and provides main bearing capacity, can make pile 1 need not insert hardpan, need not to excavate the construction, and pile 1 length reduces simultaneously, construction convenience. Hard earth layers to which the present invention refers include, but are not limited to, rock layers, coarse gravel layers, crushed rock layers.
As shown in fig. 1, the swing single-pile foundation can adopt inclined swing bearing blades 2, the inclined swing bearing blades 2 are uniformly arranged around the axis of the pile body 1, the inclination directions are consistent, the inclined swing bearing blades 2 are simple to process and discharge, the processing speed is high, and the manufacturing period is short. Preferably, each inclined swirling bearing blade 2 is of a planar sheet structure, the inner side of the inclined swirling bearing blade is attached to the surface of the pile body 1 and welded, and the outer side of the inclined swirling bearing blade is parallel to the intersecting line of the inner side and the pile body 1, so that the uniform width of the swirling bearing blade 2 along the way is ensured. Preferably, the number of the inclined rotary bearing blades 2 is 2-20, the inclination angle is 30-150 degrees, the width is 0.1-10 m, and the thickness is 1-200 mm. More preferably, the inclination angle of the inclined rotary bearing blade 2 is 45-135 degrees, the inclination angle in the range can better form an interaction mode with the soil body, and the rotary bearing blade 2 is ensured to be more beneficial to shearing the soil body.
As shown in fig. 2, the single pile foundation can adopt spiral rotation bearing blades 2, at least one spiral rotation bearing blade 2 is uniformly arranged around the axis of the pile body 1, and the rotation directions are consistent, so that the spiral rotation bearing blade 2 can effectively reduce the sinking resistance of the single pile foundation, and reduce the hammering energy and times in the rotation process. Preferably, the number of the spiral rotation bearing blades 2 is 1-20, the spiral angle is 18-360 degrees, the width is 0.1-10 m, and the thickness is 1-200 mm. More preferably, the spiral angle of the spiral rotation bearing blade 2 is 45-135 degrees, and the inclination angle in the range can better form an interaction mode with the soil body, so that the rotation bearing blade 2 is ensured to be more beneficial to shearing the soil body.
The blade assembly width of the rotation bearing blade 2 can be changed along the height direction according to the soil body strength of different soil layers and the stress of the pile body 1, the blade assembly width at the weak position of the soil body is wide, and the blade assembly width at the strong position of the soil body is narrow. According to the change, the diameter of the pile body 1 and the extension width of the rotation bearing blade 2 can also have the following forms: 1) the diameter of the pile body 1 is consistent along the height direction, and the extension width of the rotary bearing blade 2 is consistent along the height direction; the method is generally suitable for the condition that soil quality of a soil layer corresponding to the rotary bearing blade 2 is uniform under the in-place state of a foundation. 2) The diameter of the pile body 1 is reduced along the height direction, the extension width of the rotary bearing blade 2 is changed along the height direction, and the extension width of the whole rotary single pile foundation is consistent along the height direction; the method is generally suitable for the conditions that soil texture of a soil layer corresponding to the rotary bearing blades 2 is uneven and the overall diameter of a single-pile foundation is limited under the in-place state of the foundation. 3) The diameter of the pile body 1 is reduced along the height direction, the extension width of the rotary bearing blade 2 is changed along the height direction, and the overall extension width of the rotary single pile foundation is changed along the height direction; the method is generally suitable for the condition that soil quality of a soil layer corresponding to the rotary bearing blade 2 is not uniform under the in-place state of a foundation.
Further, as shown in fig. 3 and 4, a blade pipeline 3 can be arranged on the pile body 1 along the root of the rotation bearing blade 2, and a plurality of blade nozzles facing the outside of the pile body 1 are uniformly arranged on the blade pipeline 3 at intervals. In the piling process, water is sprayed to the surrounding soil body through the blade spray heads so as to reduce the side frictional resistance of the pile soil.
Further, as shown in fig. 3 and 4, the section of the pile body 1 of the spin bearing blade 2 is connected, the pipe wall of the section is thickened inwards, a plurality of pile side pipelines 4 are uniformly distributed on the inner wall of the thickened section in the circumferential direction, and a plurality of pile side nozzles facing the inside of the pile body 1 are uniformly arranged on the pile side pipelines 4 at intervals. During the piling process, water is sprayed to the surrounding soil body through the pile side spray heads so as to reduce the pile soil side frictional resistance; after the foundation is in place, the pile side spray heads spray the slurry, so that the bearing capacity of the soil body can be increased.
When the spin single-pile foundation is constructed, universal piling equipment (such as a piling hammer 5) is adopted for piling, along with the downward hammering acting force of the piling hammer 5 on the pile body 1, the pile body 1 automatically rotates downwards to enter the soil under the interaction of the spin bearing blades 2 and the soil body, in addition, the spin bearing blades 2 have certain shearing action on the foundation in the rotating process of the pile body 1, the surrounding soil body is disturbed, the strength of the surrounding soil body is weakened, and the spin single-pile foundation is gradually transferred into the soil body with the weakened strength under the self torsion action. Preferably, in the piling process, water can be sprayed to the surrounding soil body through the blade spray heads on the blade pipelines 3 and the pile side spray heads on the pile side pipelines 4 so as to reduce the pile-soil side frictional resistance. Preferably, the single pile foundation is screwed in place and then the slurry is sprayed through the pile side nozzles on the pile side pipelines 4, so that the bearing capacity of the soil body can be improved.
In the piling process, the pile body 1 is driven by the rotary bearing blades 2 to easily enter the ground, and after the pile body is in place, the rotary bearing blades 2 provide main bearing capacity, and the effective load area of the pile body 1 is much larger than the sectional area of a conventional single pile, so that the rotary single pile foundation has larger bearing capacity. The bearing capacity of the foundation of the screwing single pile is larger, so that the pile length of the pile body 1 is reduced compared with that of the conventional single pile, the construction is convenient, and the construction cost and the installation cost are low; because the rotary bearing blade 2 has a certain shearing effect on the soil body, a piling hammer with smaller energy than that of a conventional single pile can be selected in the construction process, and the installation cost is reduced.
Example 1
As shown in fig. 2 to 4, the present embodiment discloses a screwing single-pile foundation and a construction method thereof, wherein the foundation is located in the site as follows: the depth of the pile body 1 in the ground is 36m considering that the depth of the rock layer 7 in the ground is 36m, and the depth of the rock layer 7 in the ground is 0-36 m. According to the situation of a site, the spiral spin bearing blades 2 are arranged on the outer side of the bottom of the pile body 1, and the bottom of the pile body 1 is arranged on the top of a hard soil layer after the foundation is in place. The large-section-area rotary bearing blade 2 provides large bearing capacity, so that the pile body does not need to be inserted into the rock layer 7, excavation construction is not needed, the length of the pile body is reduced, construction is convenient, and installation cost is low.
The pile body 1 of the driving single pile foundation adopts a steel structure, the total length of the pile body is 68m, the pile length above a soil layer is 32m, the diameter of the pile body above the soil layer is 8m, the pile body above the soil layer is 1m-26m and is a diameter-variable section, the upper section diameter of the diameter-variable section is 6m, and the diameter of the pile body above the soil layer is 26m-32m and is a straight section with the diameter of 6 m; the diameter of a pile body in a soil layer is 8 m; the wall thickness of the pile body 2 is 60 mm-75 mm. According to the field condition, arrange in 1 bottom of pile body (7 upper portions on rock layer) outside and beat and revolve and bear blade 2, beat and revolve and bear blade 2 and adopt the steel construction, four pieces beat and revolve to the unanimity of turning to that bears blade 3, thickness 60mm, helix angle 90, height 8m, width 2 m.
The root of the rotary bearing blade 3 is provided with a blade pipeline 3, and blade spray heads are uniformly distributed on the blade pipeline 3. The pipe wall of 1 bottom of pile body and the 3 connected sections of bearing blade of whirling is inboard bodiness, and the wall thickness is 200mm, and the inner wall hoop equipartition of this bodiness section has stake side pipeline 4, evenly is provided with a plurality of stake side shower nozzles on the stake side pipeline 4.
The universal pile hammer 5 is adopted for piling, the pile body 1 automatically rotates under the action of the rotary bearing blade 2 along with the hammering of the pile hammer 5 in the piling process, the rotary bearing blade 2 rotates to have a certain shearing action on a foundation, the surrounding soil body is disturbed, the strength of the surrounding soil body is weakened, and the rotary single-pile foundation gradually turns into the soil body with weakened strength under the action of self torsion. And a blade nozzle of the blade pipeline 3 sprays water to soak the soil body in the process of screwing the pile body 1 in. The pile side nozzle of the pile side pipeline 4 sprays water in the process of screwing the pile body 1 in, and the foundation is sprayed with slurry after being in place.
Example 2
As shown in fig. 6 to 7, the present embodiment discloses a screwing single-pile foundation and a construction method thereof, wherein the foundation is located in the site as follows: the depth of the soil is 0-6 m, namely an upper soft soil layer 8, the depth of the soil is 6m-30m, namely a harder soil layer 9, and the depth of the soil is 30m-36m, namely a lower soft soil layer 10. According to the field condition, two layers of spiral beating-rotating bearing blades 2 are arranged on the outer side of the upper portion and the outer side of the lower portion of the pile body 1, the beating-rotating bearing blades 2 on the upper layer correspond to the height of the position of an upper soft soil layer 8 of a foundation in an on-site state, the beating-rotating bearing blades 2 on the lower layer correspond to the height of the position of an upper soft soil layer 10 of the foundation in an on-site state, the soil body bearing capacity can be improved, the length of the pile body is reduced, construction is convenient, and installation cost is low.
The pile body 1 of the driving single pile foundation adopts a steel structure, the total length of the pile body is 68m, the pile length above a soil layer is 32m, the diameter of the pile body above the soil layer is 8m, the pile body above the soil layer is 1m-26m and is a diameter-variable section, the upper section diameter of the diameter-variable section is 6m, and the diameter of the pile body above the soil layer is 26m-32m and is a straight section with the diameter of 6 m; the diameter of a pile body in a soil layer is 8 m; the wall thickness of the pile body 2 is 60 mm-75 mm. In the in-place state of the foundation, the upper layer of rotation bearing blades 2 are arranged in the range of the position with the soil penetration depth of 0-6 m corresponding to the pile body 1, and the lower layer of rotation bearing blades 2 are arranged in the range of the position with the soil penetration depth of 30-36 m corresponding to the pile body 1. Beat and revolve and bear blade 2 and adopt the steel construction, the upper strata and the lower floor beat and revolve and bear the rotation of blade 2 unanimously, thickness 60mm, helix angle 90, height 6m, width 2 m.
The root of the rotary bearing blade 3 is provided with a blade pipeline 3, and blade spray heads are uniformly distributed on the blade pipeline 3. The pipe wall of 1 bottom of pile body and the 3 connected sections of bearing blade of whirling is inboard bodiness, and the wall thickness is 200mm, and the inner wall hoop equipartition of this bodiness section has stake side pipeline 4, evenly is provided with a plurality of stake side shower nozzles on the stake side pipeline 4.
The universal pile hammer 5 is adopted for piling, the pile body 1 automatically rotates under the action of the rotary bearing blade 2 along with the hammering of the pile hammer 5 in the piling process, the rotary bearing blade 2 rotates to have a certain shearing action on a foundation, the surrounding soil body is disturbed, the strength of the surrounding soil body is weakened, and the rotary single-pile foundation gradually turns into the soil body with weakened strength under the action of self torsion. And a blade nozzle of the blade pipeline 3 sprays water to soak the soil body in the process of screwing the pile body 1 in. The pile side nozzle of the pile side pipeline 4 sprays water in the process of screwing the pile body 1 in, and the foundation is sprayed with slurry after being in place.
Example 3
As shown in fig. 8 to 9, the present embodiment discloses a screwing single-pile foundation and a construction method thereof, wherein the foundation is located in the site as follows: the normal soil layer 6 is 0-26 m below the mud surface, and the silt layer 12 (belonging to a cohesive soil layer in a soft plastic/flow plastic state) with weaker strength is 26-36 m below the mud surface. According to the field condition, the spiral rotary bearing blade 2 is arranged outside the bottom of the pile body 1, so that the bearing capacity of a soil body can be improved, the length of the pile body is reduced, the construction is convenient, and the installation cost is low.
The pile body 1 of the driving single-pile foundation is of a steel structure, the total length of the pile body is 70m, the pile length above a mud surface is 34m, the diameter of the pile body above the mud surface is 8m, the pile body above the mud surface is 1m-28m and is a diameter-variable section, the upper section diameter of the diameter-variable section is 6m, and the upper section diameter of the pile body above the mud surface is 26m-32m and is a straight section with the diameter of 6 m; the wall thickness of the pile body 2 is 60 mm-75 mm. In the in-place state of the foundation, a straight section with the pile diameter of 8m is 0-12 m below the mud surface, a pile body reducing section is 12-26 m below the mud surface, the diameter of the lower section of the pile body reducing section is 4m, a straight section with the diameter of 4m is 26-36 m below the mud surface, a rotary bearing blade 3 is arranged on the outer side of the pile body 1 with the mud penetration depth of 26-36 m, and the width of the rotary bearing blade 3 is 2m, so that the outer diameter of the rotary single-pile foundation below the mud surface is kept consistent. The section connected with the bottom of the pile body 1 and the rotation bearing blade 3 is subjected to reducing treatment, so that the purposes of small disturbance range of the surrounding soil body and small grouting range after the soil body is in place can be achieved.
The rotary bearing blades 2 are made of steel structures, the rotary directions of the four rotary bearing blades 2 are consistent, the thickness is 60mm, the spiral angle is 90 degrees, and the height is 8 m.
The root of the rotary bearing blade 3 is provided with a blade pipeline 3, and blade spray heads are uniformly distributed on the blade pipeline 3. The pipe wall of 1 bottom of pile body and the 3 connected sections of bearing blade of whirling is inboard bodiness, and the wall thickness is 200mm, and the inner wall hoop equipartition of this bodiness section has stake side pipeline 4, evenly is provided with a plurality of stake side shower nozzles on the stake side pipeline 4.
The universal pile hammer 5 is adopted for piling, the pile body 1 automatically rotates under the action of the rotary bearing blade 2 along with the hammering of the pile hammer 5 in the piling process, the rotary bearing blade 2 rotates to have a certain shearing action on a foundation, the surrounding soil body is disturbed, the strength of the surrounding soil body is weakened, and the rotary single-pile foundation gradually turns into the soil body with weakened strength under the action of self torsion. And a blade nozzle of the blade pipeline 3 sprays water to soak the soil body in the process of screwing the pile body 1 in. The pile side nozzle of the pile side pipeline 4 sprays water in the process of screwing the pile body 1 in, and the foundation is sprayed with slurry after being in place.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various changes and modifications within the spirit and scope of the present invention without departing from the spirit and scope of the appended claims.
Claims (10)
1. The utility model provides a beat and revolve single pile basis, includes the pile body, its characterized in that, the pile body outside is provided with slope form or spiral helicine beat and revolve and bear the blade, beat and revolve and bear the blade and be used for the screw in ground.
2. A rotary single-pile foundation according to claim 1, wherein a soft soil layer exists in a foundation in-place site, and the rotary bearing blades are arranged at the height of the pile body corresponding to the position of the soft soil layer in the foundation in a state that the foundation is in place.
3. A rotary monopile foundation according to claim 1 in which the foundation in place has a hardpan, and the rotary carrying blades are arranged at the bottom of the pile body.
4. A rotary monopile foundation according to claim 1 in which the rotary load bearing blades are arranged throughout the length of the outside of the pile body.
5. A rotary single-pile foundation according to any one of claims 1 to 4, wherein the width of the rotary bearing blades is adjusted according to the soil strength and the pile body stress according to the soil mass condition of the soil mass corresponding to the rotary bearing blades in the foundation in the in-place state;
the diameters of the pile bodies are consistent along the height direction, and the extension widths of the rotation bearing blades are consistent along the height direction;
or the diameter of the pile body is reduced along the height direction, the extension width of the rotary bearing blade is changed along the height direction, and the overall extension width of the rotary single pile foundation is consistent along the height direction;
or the diameter of the pile body is variable in diameter along the height direction, the extension width of the rotary bearing blade is changed along the height direction, and the overall extension width of the rotary single pile foundation is changed along the height direction.
6. A rotary monopile foundation according to any one of claims 1-4, characterised in that the pile body is provided outside along the rotary load bearing blade root with a blade duct arranged with a plurality of blade nozzles.
7. A rotary monopile foundation as claimed in any one of claims 1 to 4 in which the pile body is thickened inwardly of the wall of the section to which the rotary load bearing blades are attached, the inner wall of the thickened section being circumferentially and uniformly provided with pile side pipes, the pile side pipes being provided with a plurality of pile side nozzles.
8. A method of constructing a rotary monopile foundation according to any one of claims 1 to 4 in which the rotary monopile foundation is driven by a pile driving apparatus, the pile body being automatically rotated downwardly into the ground by the interaction of the rotary carrying blades with the ground during driving.
9. A method of constructing a rotary mono-pile foundation as claimed in claim 8 wherein a blade duct is provided along the root of the rotary load bearing blade outside the pile body, the blade duct having a plurality of blade nozzles arranged therein; and water is sprayed to the soil body through the blade spray heads in the piling process.
10. The construction method of a screwing single pile foundation according to claim 8, wherein the pipe wall of the pile body is thickened at the inner side of the section connected with the screwing bearing blade, pile side pipelines are circumferentially and uniformly distributed on the inner wall of the thickened section, and the pile side pipelines are provided with a plurality of pile side nozzles; and spraying water to the soil body through the pile side spray head in the piling process, and spraying the slurry to the soil body through the pile side spray head after the single pile foundation is in place.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07189249A (en) * | 1993-12-27 | 1995-07-28 | Chiyoda Koei Kk | Method of burying construction of inverted conical-shaped multi-blade steel pipe pile |
| JP2000096559A (en) * | 1998-09-18 | 2000-04-04 | Nkk Corp | Screwing-type pile and execution method thereof |
| CN1837501A (en) * | 2005-03-24 | 2006-09-27 | 曹兴明 | Grouted screw pile ,construction method therefor and grouting arrangement employing same |
| JP2014109097A (en) * | 2012-11-30 | 2014-06-12 | Chiyoda Geotech Co Ltd | Foot protection method for rotary penetration pile |
| CN110847165A (en) * | 2019-11-29 | 2020-02-28 | 河海大学 | Construction method of spiral anchor core-inserting cement mixing pile |
-
2020
- 2020-03-25 CN CN202010220668.2A patent/CN111395327B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07189249A (en) * | 1993-12-27 | 1995-07-28 | Chiyoda Koei Kk | Method of burying construction of inverted conical-shaped multi-blade steel pipe pile |
| JP2000096559A (en) * | 1998-09-18 | 2000-04-04 | Nkk Corp | Screwing-type pile and execution method thereof |
| CN1837501A (en) * | 2005-03-24 | 2006-09-27 | 曹兴明 | Grouted screw pile ,construction method therefor and grouting arrangement employing same |
| JP2014109097A (en) * | 2012-11-30 | 2014-06-12 | Chiyoda Geotech Co Ltd | Foot protection method for rotary penetration pile |
| CN110847165A (en) * | 2019-11-29 | 2020-02-28 | 河海大学 | Construction method of spiral anchor core-inserting cement mixing pile |
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| CN111395327B (en) | 2022-04-05 |
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Effective date of registration: 20231208 Address after: 300072 tiandaxinyuan village, Nankai District, Tianjin Patentee after: Ding Hongyan Patentee after: Zhang Puyang Patentee after: Shanghai East Ocean Engineering Technology Co.,Ltd. Patentee after: SHANGHAI INVESTIGATION, DESIGN & RESEARCH INSTITUTE Co.,Ltd. Address before: 300072 tiandaxinyuan village, Nankai District, Tianjin Patentee before: Ding Hongyan Patentee before: Zhang Puyang Patentee before: Shanghai East Ocean Engineering Technology Co.,Ltd. |